Programmable-Gain Sense Amplifier Handles Bidirectional Current Sensing

April 16, 2007
Linear Technology’s LTC6104 permits bidirectional operation with the flexibility of gain programmability for each current-sense direction.

As a high-side current-sense amplifier composed of two complete amplifiers with a combined single bipolar output, the LTC6104 from Linear Technology Corp. is well-suited for bidirectional operation. The dual-amplifier topology offers exceptional flexibility by allowing gain programmability for each current-sense direction. The use of separate amplifiers also allows monitoring of a single current-sense resistor or separate sense resistors. Typical applications include battery-charging circuitry, H-bridge driver circuits, and servo controls.

The LTC6104’s input bias current is 170 nA max, and its input offset voltage is ±450 µV max. This precision performance allows the device to resolve tiny current and operate over a wide dynamic range. The amplifier withstands voltages up to 70 V, which is important when power-supply failures or catastrophic load changes can lead to voltage flyback conditions. With a response time under 1 µs, the LTC6104 is well-suited for an automatic power shutdown function under fault conditions. Users set the gain with three external resistors, and thus the use of precision resistors permits accuracy better than 1%.

AVAILABILITY
The LTC6104 is in full production now. PRICING
Prices start at $1.38 each in 1000-piece quantities. FOR MORE INFORMATION
Visit www.linear.com.

Sponsored Recommendations

Highly Integrated 20A Digital Power Module for High Current Applications

March 20, 2024
Renesas latest power module delivers the highest efficiency (up to 94% peak) and fast time-to-market solution in an extremely small footprint. The RRM12120 is ideal for space...

Empowering Innovation: Your Power Partner for Tomorrow's Challenges

March 20, 2024
Discover how innovation, quality, and reliability are embedded into every aspect of Renesas' power products.

Article: Meeting the challenges of power conversion in e-bikes

March 18, 2024
Managing electrical noise in a compact and lightweight vehicle is a perpetual obstacle

Power modules provide high-efficiency conversion between 400V and 800V systems for electric vehicles

March 18, 2024
Porsche, Hyundai and GMC all are converting 400 – 800V today in very different ways. Learn more about how power modules stack up to these discrete designs.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!